```html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>SnapDOM - 高保真DOM转图像解决方案</title>
    <link href="https://cdn.staticfile.org/font-awesome/6.4.0/css/all.min.css" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap" rel="stylesheet">
    <link href="https://cdn.staticfile.org/tailwindcss/2.2.19/tailwind.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/mermaid@latest/dist/mermaid.min.js"></script>
    <style>
        body {
            font-family: 'Noto Sans SC', Tahoma, Arial, Roboto, "Droid Sans", "Helvetica Neue", "Droid Sans Fallback", "Heiti SC", "Hiragino Sans GB", Simsun, sans-serif;
            background-color: #f8fafc;
            color: #1e293b;
        }
        .hero-gradient {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }
        .code-block {
            background-color: #1e293b;
            border-left: 4px solid #7c3aed;
        }
        .drop-cap:first-letter {
            float: left;
            font-size: 3.5rem;
            line-height: 2.5rem;
            padding-top: 0.5rem;
            padding-right: 0.5rem;
            font-weight: 700;
            color: #4f46e5;
        }
        .transition-all {
            transition: all 0.3s ease;
        }
    </style>
</head>
<body class="antialiased">
    <!-- Hero Section -->
    <section class="hero-gradient text-white">
        <div class="container mx-auto px-6 py-24 md:py-32">
            <div class="max-w-4xl mx-auto text-center">
                <div class="inline-block bg-white bg-opacity-20 px-4 py-1 rounded-full mb-4">
                    <span class="text-sm font-semibold tracking-wider">开源解决方案</span>
                </div>
                <h1 class="text-4xl md:text-6xl font-bold mb-6 leading-tight">SnapDOM</h1>
                <p class="text-xl md:text-2xl font-light mb-8 opacity-90 max-w-3xl mx-auto leading-relaxed">
                    高保真、高性能的DOM转图像JavaScript库，完美保留样式、字体和阴影
                </p>
                <div class="flex flex-col md:flex-row justify-center gap-4">
                    <a href="#get-started" class="bg-white text-indigo-600 hover:bg-gray-100 px-8 py-3 rounded-lg font-semibold transition-all shadow-lg">
                        立即开始
                    </a>
                    <a href="https://github.com/zumerlab/snapdom" target="_blank" class="bg-transparent border-2 border-white hover:bg-white hover:bg-opacity-10 px-8 py-3 rounded-lg font-semibold transition-all">
                        <i class="fab fa-github mr-2"></i> GitHub
                    </a>
                </div>
            </div>
        </div>
    </section>

    <!-- Feature Showcase -->
    <section class="py-20 bg-white">
        <div class="container mx-auto px-6">
            <div class="max-w-4xl mx-auto text-center mb-16">
                <h2 class="text-3xl md:text-4xl font-bold mb-4">为什么选择SnapDOM？</h2>
                <p class="text-lg text-gray-600 max-w-2xl mx-auto">
                    解决传统DOM截图工具的痛点，为开发者提供高速、高保真的解决方案
                </p>
            </div>
            
            <div class="grid md:grid-cols-2 lg:grid-cols-3 gap-8">
                <div class="feature-card bg-gray-50 p-8 rounded-xl shadow-md transition-all">
                    <div class="text-indigo-600 text-4xl mb-4">
                        <i class="fas fa-bolt"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">极致速度</h3>
                    <p class="text-gray-600">
                        通过智能缓存和CSS增量构建，捕获复杂DOM速度远超同类工具，性能领先html2canvas数倍
                    </p>
                </div>
                
                <div class="feature-card bg-gray-50 p-8 rounded-xl shadow-md transition-all">
                    <div class="text-indigo-600 text-4xl mb-4">
                        <i class="fas fa-eye"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">高保真渲染</h3>
                    <p class="text-gray-600">
                        支持Web组件、复杂伪元素、@font-face字体，捕获结果接近原生视觉效果
                    </p>
                </div>
                
                <div class="feature-card bg-gray-50 p-8 rounded-xl shadow-md transition-all">
                    <div class="text-indigo-600 text-4xl mb-4">
                        <i class="fas fa-puzzle-piece"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">模块化设计</h3>
                    <p class="text-gray-600">
                        提供toPng、toJpg等独立方法，支持树摇优化，减小打包体积
                    </p>
                </div>
                
                <div class="feature-card bg-gray-50 p-8 rounded-xl shadow-md transition-all">
                    <div class="text-indigo-600 text-4xl mb-4">
                        <i class="fas fa-file-image"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">多格式支持</h3>
                    <p class="text-gray-600">
                        支持SVG、PNG、JPG、WebP和Canvas输出，满足不同使用需求
                    </p>
                </div>
                
                <div class="feature-card bg-gray-50 p-8 rounded-xl shadow-md transition-all">
                    <div class="text-indigo-600 text-4xl mb-4">
                        <i class="fas fa-filter"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">精确控制</h3>
                    <p class="text-gray-600">
                        支持filter和exclude选项，精确控制捕获内容，避免冗余元素
                    </p>
                </div>
                
                <div class="feature-card bg-gray-50 p-8 rounded-xl shadow-md transition-all">
                    <div class="text-indigo-600 text-4xl mb-4">
                        <i class="fas fa-sync-alt"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">实时捕获</h3>
                    <p class="text-gray-600">
                        特别适合动态内容和实时应用场景，快速响应UI变化
                    </p>
                </div>
            </div>
        </div>
    </section>

    <!-- Problem Solution Section -->
    <section class="py-20 bg-gray-50">
        <div class="container mx-auto px-6">
            <div class="max-w-6xl mx-auto">
                <div class="md:flex items-center gap-12">
                    <div class="md:w-1/2 mb-12 md:mb-0">
                        <h2 class="text-3xl font-bold mb-6">它能解决什么问题？</h2>
                        <p class="text-gray-600 mb-6 leading-relaxed">
                            生成网页截图或将DOM元素转为图像时，用户常遇到以下痛点：
                        </p>
                        <ul class="space-y-3">
                            <li class="flex items-start">
                                <div class="text-indigo-600 mt-1 mr-3">
                                    <i class="fas fa-exclamation-circle"></i>
                                </div>
                                <span class="text-gray-700">
                                    现有工具（如html2canvas）在复杂DOM结构下速度慢、渲染不准确
                                </span>
                            </li>
                            <li class="flex items-start">
                                <div class="text-indigo-600 mt-1 mr-3">
                                    <i class="fas fa-exclamation-circle"></i>
                                </div>
                                <span class="text-gray-700">
                                    伪元素、影子DOM或自定义字体常丢失或渲染错误
                                </span>
                            </li>
                            <li class="flex items-start">
                                <div class="text-indigo-600 mt-1 mr-3">
                                    <i class="fas fa-exclamation-circle"></i>
                                </div>
                                <span class="text-gray-700">
                                    大型网页或动态内容捕获时易出现性能瓶颈或文件过大
                                </span>
                            </li>
                        </ul>
                        <p class="mt-6 text-gray-600 leading-relaxed">
                            SnapDOM通过优化缓存和模块化架构，提供高速、高保真的DOM捕获，特别适合复杂UI和实时应用场景。
                        </p>
                    </div>
                    <div class="md:w-1/2">
                        <img src="https://cdn.nlark.com/yuque/0/2025/png/21449790/1753944515229-d2e41f53-0418-4367-b6e6-a4864789b489.png" alt="SnapDOM示例" class="rounded-xl shadow-xl w-full">
                    </div>
                </div>
            </div>
        </div>
    </section>

    <!-- Use Cases Section -->
    <section class="py-20 bg-white">
        <div class="container mx-auto px-6">
            <div class="max-w-4xl mx-auto text-center mb-16">
                <h2 class="text-3xl font-bold mb-4">使用场景</h2>
                <p class="text-lg text-gray-600">
                    适用于多种前端开发和设计场景
                </p>
            </div>
            
            <div class="grid md:grid-cols-3 gap-8">
                <div class="bg-indigo-50 p-8 rounded-xl">
                    <div class="text-indigo-600 text-3xl mb-4">
                        <i class="fas fa-paint-brush"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">UI设计验证</h3>
                    <p class="text-gray-700 mb-4">
                        设计师捕获组件截图，验证样式一致性。例如，将React组件转为PNG，用于跨浏览器UI测试。
                    </p>
                    <p class="text-indigo-600 font-medium">
                        你是否需要快速验证设计稿与实际渲染的差异？
                    </p>
                </div>
                
                <div class="bg-purple-50 p-8 rounded-xl">
                    <div class="text-purple-600 text-3xl mb-4">
                        <i class="fas fa-share-alt"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">动态内容分享</h3>
                    <p class="text-gray-700 mb-4">
                        社交媒体平台将用户生成的动态卡片（如数据仪表板）转为JPG，供用户下载分享。
                    </p>
                </div>
                
                <div class="bg-blue-50 p-8 rounded-xl">
                    <div class="text-blue-600 text-3xl mb-4">
                        <i class="fas fa-vial"></i>
                    </div>
                    <h3 class="text-xl font-bold mb-3">自动化测试</h3>
                    <p class="text-gray-700 mb-4">
                        测试工程师使用SnapDOM生成页面截图，集成到CI/CD流程，检测视觉回归。
                    </p>
                    <p class="text-blue-600 font-medium">
                        你的测试流程是否需要高效的截图工具？
                    </p>
                </div>
            </div>
        </div>
    </section>

    <!-- Comparison Section -->
    <section class="py-20 bg-gray-50">
        <div class="container mx-auto px-6">
            <div class="max-w-4xl mx-auto">
                <h2 class="text-3xl font-bold mb-12 text-center">SnapDOM与同类工具对比</h2>
                
                <div class="bg-white rounded-xl shadow-md overflow-hidden">
                    <div class="grid grid-cols-4 bg-gray-100 border-b">
                        <div class="p-4 font-semibold">功能</div>
                        <div class="p-4 font-semibold text-center">SnapDOM</div>
                        <div class="p-4 font-semibold text-center">html2canvas</div>
                        <div class="p-4 font-semibold text-center">html-to-image</div>
                    </div>
                    
                    <div class="grid grid-cols-4 border-b">
                        <div class="p-4">渲染速度</div>
                        <div class="p-4 text-center text-green-600 font-semibold">极快</div>
                        <div class="p-4 text-center text-gray-600">中</div>
                        <div class="p-4 text-center text-gray-600">中</div>
                    </div>
                    
                    <div class="grid grid-cols-4 border-b">
                        <div class="p-4">伪元素支持</div>
                        <div class="p-4 text-center text-green-600 font-semibold">✓</div>
                        <div class="p-4 text-center text-red-500">×</div>
                        <div class="p-4 text-center text-red-500">×</div>
                    </div>
                    
                    <div class="grid grid-cols-4 border-b">
                        <div class="p-4">影子DOM支持</div>
                        <div class="p-4 text-center text-green-600 font-semibold">✓</div>
                        <div class="p-4 text-center text-red-500">×</div>
                        <div class="p-4 text-center text-red-500">×</div>
                    </div>
                    
                    <div class="grid grid-cols-4 border-b">
                        <div class="p-4">WebP输出</div>
                        <div class="p-4 text-center text-green-600 font-semibold">✓</div>
                        <div class="p-4 text-center text-red-500">×</div>
                        <div class="p-4 text-center text-gray-600">✓</div>
                    </div>
                    
                    <div class="grid grid-cols-4">
                        <div class="p-4">模块化API</div>
                        <div class="p-4 text-center text-green-600 font-semibold">✓</div>
                        <div class="p-4 text-center text-red-500">×</div>
                        <div class="p-4 text-center text-gray-600">✓</div>
                    </div>
                </div>
                
                <div class="mt-8 p-6 bg-indigo-50 rounded-xl">
                    <h3 class="text-xl font-bold mb-3 text-indigo-800">优势与特色</h3>
                    <p class="text-gray-700 mb-4">
                        相比html2canvas、html-to-image等工具，SnapDOM的独特之处在于：
                    </p>
                    <ul class="space-y-2">
                        <li class="flex items-start">
                            <div class="text-indigo-600 mt-1 mr-2">✓</div>
                            <span class="text-gray-700">
                                <strong>极致速度：</strong>通过智能缓存和CSS增量构建，捕获复杂DOM速度远超同类工具
                            </span>
                        </li>
                        <li class="flex items-start">
                            <div class="text-indigo-600 mt-1 mr-2">✓</div>
                            <span class="text-gray-700">
                                <strong>高保真渲染：</strong>支持Web组件、复杂伪元素、@font-face字体，捕获结果接近原生视觉效果
                            </span>
                        </li>
                        <li class="flex items-start">
                            <div class="text-indigo-600 mt-1 mr-2">✓</div>
                            <span class="text-gray-700">
                                <strong>无依赖设计：</strong>基于标准Web API，无需额外依赖，适配多种浏览器环境
                            </span>
                        </li>
                    </ul>
                    <p class="mt-4 text-gray-700">
                        <strong>局限性：</strong>非模块化版本（script标签引入）可能因全局对象问题导致兼容性错误；自定义字体需预加载，配置稍复杂。
                    </p>
                </div>
            </div>
        </div>
    </section>

    <!-- Getting Started -->
    <section id="get-started" class="py-20 bg-white">
        <div class="container mx-auto px-6">
            <div class="max-w-4xl mx-auto">
                <h2 class="text-3xl font-bold mb-2">上手指南</h2>
                <p class="text-gray-600 mb-8">几分钟内开始使用SnapDOM</p>
                
                <div class="mb-12">
                    <h3 class="text-xl font-semibold mb-4 text-indigo-600 flex items-center">
                        <i class="fas fa-download mr-2"></i> 安装SnapDOM
                    </h3>
                    <p class="text-gray-700 mb-4">通过NPM或CDN引入：</p>
                    <div class="code-block text-gray-100 p-6 rounded-lg mb-4 overflow-x-auto">
                        <pre class="whitespace-pre-wrap"><code>npm install @zumer/snapdom</code></pre>
                    </div>
                    <p class="text-gray-700 mb-2">或</p>
                    <div class="code-block text-gray-100 p-6 rounded-lg overflow-x-auto">
                        <pre class="whitespace-pre-wrap"><code>&lt;script type="module" src="https://cdn.jsdelivr.net/npm/@zumer/snapdom/dist/snapdom.mjs"&gt;&lt;/script&gt;</code></pre>
                    </div>
                </div>
                
                <div class="mb-12">
                    <h3 class="text-xl font-semibold mb-4 text-indigo-600 flex items-center">
                        <i class="fas fa-code mr-2"></i> 基本用法
                    </h3>
                    <p class="text-gray-700 mb-4">选择目标DOM元素并调用API：</p>
                    <div class="code-block text-gray-100 p-6 rounded-lg overflow-x-auto">
                        <pre class="whitespace-pre-wrap"><code>import { snapdom } from '@zumer/snapdom';
const el = document.querySelector('#target');
const img = await snapdom.toPng(el, { scale: 2 });
document.body.appendChild(img);</code></pre>
                    </div>
                </div>
                
                <div class="mb-12">
                    <h3 class="text-xl font-semibold mb-4 text-indigo-600 flex items-center">
                        <i class="fas fa-tachometer-alt mr-2"></i> 性能优化
                    </h3>
                    <p class="text-gray-700 mb-4">预加载资源以提高复杂页面捕获效率：</p>
                    <div class="code-block text-gray-100 p-6 rounded-lg overflow-x-auto">
                        <pre class="whitespace-pre-wrap"><code>import { preCache } from '@zumer/snapdom';
await preCache(document.body, { embedFonts: true });</code></pre>
                    </div>
                </div>
                
                <div class="mb-12">
                    <h3 class="text-xl font-semibold mb-4 text-indigo-600 flex items-center">
                        <i class="fas fa-file-export mr-2"></i> 导出图像
                    </h3>
                    <p class="text-gray-700 mb-4">保存为文件或显示：</p>
                    <div class="code-block text-gray-100 p-6 rounded-lg overflow-x-auto">
                        <pre class="whitespace-pre-wrap"><code>await snapdom.download(el, { format: 'jpg', filename: 'capture.jpg' });</code></pre>
                    </div>
                    <p class="mt-4 text-gray-600 italic">
                        提示：建议从简单元素开始测试，逐步增加伪元素或影子DOM以熟悉功能。
                    </p>
                </div>
            </div>
        </div>
    </section>

    <!-- Cost Section -->
    <section class="py-20 bg-indigo-600 text-white">
        <div class="container mx-auto px-6">
            <div class="max-w-4xl mx-auto text-center">
                <h2 class="text-3xl font-bold mb-6">使用门槛与成本</h2>
                <div class="grid md:grid-cols-3 gap-8">
                    <div class="bg-white bg-opacity-10 p-6 rounded-xl">
                        <div class="text-4xl mb-4">
                            <i class="fas fa-user-plus"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-2">注册需求</h3>
                        <p>无需注册，GitHub仓库公开，免费下载和使用</p>
                    </div>
                    <div class="bg-white bg-opacity-10 p-6 rounded-xl">
                        <div class="text-4xl mb-4">
                            <i class="fas fa-tag"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-2">成本</h3>
                        <p>完全开源，MIT许可证，免费使用。无高级版本或付费订阅</p>
                    </div>
                    <div class="bg-white bg-opacity-10 p-6 rounded-xl">
                        <div class="text-4xl mb-4">
                            <i class="fas fa-laptop-code"></i>
                        </div>
                        <h3 class="text-xl font-bold mb-2">环境要求</h3>
                        <p>需现代浏览器支持（如Chromium、Safari），部分功能在Safari上可能回退为PNG</p>
                    </div>
                </div>
            </div>
        </div>
    </section>

    <!-- CTA Section -->
    <section class="py-20 bg-gray-900 text-white">
        <div class="container mx-auto px-6">
            <div class="max-w-4xl mx-auto text-center">
                <h2 class="text-3xl font-bold mb-6">准备好尝试SnapDOM了吗？</h2>
                <p class="text-xl text-gray-300 mb-8 max-w-2xl mx-auto">
                    立即开始将您的DOM元素转换为高质量的图像，体验前所未有的渲染速度和精准度。
                </p>
                <div class="flex flex-col md:flex-row justify-center gap-4">
                    <a href="https://github.com/zumerlab/snapdom" target="_blank" class="bg-indigo-600 hover:bg-indigo-700 px-8 py-4 rounded-lg font-semibold transition-all shadow-lg flex items-center justify-center">
                        <i class="fab fa-github mr-2 text-xl"></i> 查看GitHub仓库
                    </a>
                </div>
            </div>
        </div>
    </section>

    <script>
        mermaid.initialize({
            startOnLoad: true,
            theme: 'default',
            flowchart: {
                useMaxWidth: false,
                htmlLabels: true
            }
        });
    </script>
</body>
</html>
```